Toothbrush



FIG. 1 is a bottom perspective view of the toothbrush embodying the new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a left side view, the right side being a mirror image thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof. 

The ornamental design for a toothbrush, as shown and described. 